[media] vb2: stop_streaming should return void
The vb2 core ignores any return code from the stop_streaming op.
And there really isn't anything it can do anyway in case of an error.
So change the return type to void and update any drivers that implement it.
The int return gave drivers the idea that this operation could actually
fail, but that's really not the case.
The pwc amd sdr-msi3101 drivers both had this construction:
if (mutex_lock_interruptible(&s->v4l2_lock))
return -ERESTARTSYS;
This has been updated to just call mutex_lock(). The stop_streaming op
expects this to really stop streaming and I very much doubt this will
work reliably if stop_streaming just returns without really stopping the
DMA.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Pawel Osciak <pawel@osciak.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
diff --git a/Documentation/video4linux/v4l2-pci-skeleton.c b/Documentation/video4linux/v4l2-pci-skeleton.c
index 80251dc..53dd346 100644
--- a/Documentation/video4linux/v4l2-pci-skeleton.c
+++ b/Documentation/video4linux/v4l2-pci-skeleton.c
@@ -269,7 +269,7 @@
* Stop the DMA engine. Any remaining buffers in the DMA queue are dequeued
* and passed on to the vb2 framework marked as STATE_ERROR.
*/
-static int stop_streaming(struct vb2_queue *vq)
+static void stop_streaming(struct vb2_queue *vq)
{
struct skeleton *skel = vb2_get_drv_priv(vq);
@@ -277,7 +277,6 @@
/* Release all active buffers */
return_all_buffers(skel, VB2_BUF_STATE_ERROR);
- return 0;
}
/*